ARP 134-1102 3/8" Flange Header Bolt Kit for GM GEN III LS Engines

ARP 134-1102 Header Bolts, Hex Head, 30mm UHL, 10mm Wrench, 8740 Chromoly, Black Oxide, Chevy, LS, Set of 12 Fastener Style: Bolt Thread Size: 8mm x 1.25 Head Style: Hex Underhead Length (mm): 25.00mm Fastener Material: Steel Fastener Finish: Black oxide Quantity: Sold as a set of 12. ARP manufactures a variety of header bolts to facilitate the installation of your headers. Rated at 170,000 psi, they're much stronger than stock and will last under even the most severe conditions. Each kit includes the specific number of parts required for the desired application, plus premium-quality washers and either hex or 12-point heads.